Used for “In the Evening”, as reported in this March 2014 Vintage Guitar article. It can also be heard on “Carouselambra”.

Led Zeppelin’s final studio album, 1979’s In Through The Out Door, opens with an eerie, otherworldly drone that weaves and winds its way before segueing into the searing Stratocaster riffs of “In The Evening.” In the past, Jimmy Page played his Les Paul with a violin bow and waved his hands like a wizard over a Theremin. This sound was something new, however – something even more extraordinary.

That drone-like voice came thanks to a Gizmotron, a bizarre and complex mechanical guitar add-on that would make Reuben Goldberg choke with envy. Page explained that it was a “hurdy gurdy-type of thing,” which was astute as the effect worked similarly to the ancient musical instrument that created a violin-like sound with a hand-cranked wheel serving as a mechanical bow.

A prototype was used on “I’m Carrying” and Back to the Egg, as heard on the former and as quoted from bandmate Laurence Juber in this Mr. Blint’s Attic article.

Laurence Juber writes: 'when I was in Wings, Paul McCartney had a prototype 6 string Gizmo that we used on the Back To The Egg album in 1978... on another note, I played guitar with Lol and Kev on the "Wide Boys" single and video.'

Once installed on a Gibson Les Paul currently in the possession of Julian Lennon, as reported by The Gear Page member DøøG in this May 5, 2010 forum post.

When I was playing with Julian Lennon, Jules brought down some of his dads guitars, one was an LP that had the mounting plate for the Gizmo, but no Gizmo on there, I really wish he had it!!!! Love to try one of those things........

"I've also got a guitar with a Gizmo attached — that was the sustain device that Godley and Creme made. They don't make it any more. It was on a disgusting little black Ibanez, the Gizmo was worth more than the guitar. I used that on the last 12in, but I wouldn't use it live."

From 39:25 in this video of "Spellbound The John McGeoch Story" with BBC 6 Music, they mention John's use of the Gizmotron on the recording of "Into The Light" on the Juju album.

Used on It’ll End In Tears, as reported in this June 18, 2015 Red Bull Music Academy article about the Gizmotron.

Led Zeppelin’s Jimmy Page used it for the introduction of 1979’s “In the Evening,” reportedly finding it more convenient than his famed violin bow-to-guitar technique, and Cocteau Twins’ Simon Raymonde used it throughout ambient super group This Mortal Coil’s 1984 LP, It’ll End In Tears.

The brainchild of Godley and Creme, as stated by bandmate Kevin Godley on his website. It features prominently on Consequences.

In 1977 Lol Creme and I released a triple album box set called CONSEQUENCES to explore the potential of a device we’d invented years earlier called the GIZMO. It was a mechanical unit that straddled the bridge of an electric guitar and bowed the strings to simulate violin, viola, cello and contra bass. Unfortunately the technology and physical materials of the day weren't resilient enough to engineer a reliable product and the GIZMOTRON, as it was dubbed when brought to market in 1979, quickly faded from view (as did the album). Oh, it surfaced occasionally over the years, on the odd track by some big names, sonic experimentalists and fans of arcane guitar effects but, at the time, it was a double whammy kick in the balls for us, so we reluctantly let it go - we had to. The GIZMO represented an extensive period of intense work and faith with negligible critical or commercial rewards, so we moved on, let the patents expire and closed the door on that chapter of our lives.

But everything comes full circle...

KG

The brainchild of Godley and Creme, as stated by Godley on his website. It features prominently on Consequences.

In 1977 Lol Creme and I released a triple album box set called CONSEQUENCES to explore the potential of a device we’d invented years earlier called the GIZMO. It was a mechanical unit that straddled the bridge of an electric guitar and bowed the strings to simulate violin, viola, cello and contra bass. Unfortunately the technology and physical materials of the day weren't resilient enough to engineer a reliable product and the GIZMOTRON, as it was dubbed when brought to market in 1979, quickly faded from view (as did the album). Oh, it surfaced occasionally over the years, on the odd track by some big names, sonic experimentalists and fans of arcane guitar effects but, at the time, it was a double whammy kick in the balls for us, so we reluctantly let it go - we had to. The GIZMO represented an extensive period of intense work and faith with negligible critical or commercial rewards, so we moved on, let the patents expire and closed the door on that chapter of our lives.

But everything comes full circle...

KG